Willem de Kooning (American/Dutch, 1904-1997) Abstraction (Study for Mailbox), 1945; Pencil on paper (framed); 8 3/4" x 11 3/8" (sheet); Exhibition: De Kooning Retrospective Drawings 1936-1963, Allan Stone Gallery, New York, 1964; Six Painters: Mondrian, Guston, Kline, De Kooning, Pollock [and] Rothko, University of Saint Thomas, Houston, February - April 1967 (catalog published); Willem de Kooning: Three Decades of Painting, J.L Hudson Gallery, Detroit, March 19 - April 13, 1968; Willem de Kooning: Drawings and Sculptures, Walker Art Center, Minneapolis, National Gallery of Canada, Ottawa, The Phillips Collection, Washington D.C., Albright-Knox Art Gallery, March 1974 - June 1975; Houston, Museum of Fine Arts, Buffalo, Washington University Gallery of Art, St. Louis; Willem de Kooning Drawings: 1920s-1970s, Allan Stone Gallery, New York, October 30, 2007 - January 19, 2008; Literature: De Kooning Retrospective Drawings 1936-1963, Allan Stone, Allan Stone Gallery, New York, 1964, number 13, black and white illus.; Willem de Kooning: Three Decades of Painting, J. L Hudson Gallery, Detroit, 1968; De Kooning: Drawings/Sculptures, Philip Larson and Peter Schiedahl, E.P. Dutton & Co., Inc., New York, 1974, illus. b/w. fig. 39. cat. no. 22; Willem De Kooning: The First Twenty-six Years in New York--1927-1952, Sally Yard (dissertation presented to the Faculty of Princeton University in Candidacy for the Degree of Doctor of Philosophy), Garland Publishing, Inc., New York & London, 1980, number 197, illus. b/w; Willem de Kooning Drawings: 1920s-1970s, Essay by Donald Kuspit, Allan Stone Gallery, New York, 2007 p. 29 illus.; Provenance: Harold Diamond; Allan Stone Collection, New York